Since the Jeep Cherokee endured a long hiatus from 2001 to 2014, the only used Cherokees on the market these days are well-worn examples from the "XJ" era. Those unibody Jeeps proved fairly rugged, but were rudimentary appliances on the street--they were built for a long run as U.S. postal-service vehicles, with right-hand drive. We'd steer clear of those fleet models, as well as any version with rear-wheel drive or with Jeep's well-underpowered four-cylinder engine: V-6 versions were acceptably powerful, and the engine's long run in production means parts are plentiful. Jeep replaced the Cherokee with the Liberty in 2002.